pH - urine
A urine pH test measures the level of acid in urine.
After you provide a urine sample, it is tested right away. The health care provider uses a dipstick made with a color-sensitive pad. The color on the dipstick tells the provider the level of acid in your urine.
Your provider may tell you to stop taking certain medicines that can affect the results of the test. These may include:
DO NOT stop taking any medicine before talking to your provider.
Eat a normal, balanced diet for several days before the test. Note that:
The test involves only normal urination. There is no discomfort.
Your provider may order this test to check for changes in your urine acid levels. It may be done to see if you:
The normal values range from pH 4.6 to 8.0.
The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.
A high urine pH may be due to:
A low urine pH may be due to:
There are no risks with this test.
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Hamm LL, DuBose TD. Disorders of acid-bace balance. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. Brenner and Rector's The Kidney. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 16.
Riley RS, McPherson RA. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 29.BACK TO TOP
Review Date: 7/19/2021
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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